Which of the following is used to check sprouting of onion under storage?

✅Explanation:
-M.H. stands for Maleic Hydrazide. It is a growth regulator commonly used to inhibit sprouting in onions during storage. It works by disrupting the hormonal processes that trigger sprouting.
-Maleic hydrazide (MH) has been successfully used to inhibit the sprouting of onions during storage.
-Spraying onion with 2500ppm MH two weeks before harvest completely inhibits the sprouting of onion in storage.

✏️🛑Other Options Explanations:
-Option A: N.A.A. (Naphthalene Acetic Acid) is a synthetic plant hormone primarily used to promote root growth in cuttings and tissue culture.
-Option C: G.A. (Gibberellic Acid) is another plant hormone, but it generally promotes growth and seed germination, which is the opposite of what is desired for onion storage.
-Option D: P.C.P.A. (para-Chlorophenoxyacetic acid) is a synthetic auxin, a type of plant hormone, mainly used as a herbicide.
Additional Information on Chemicals and Their Uses
-Indole Butyric Acid (IBA)

✏️Uses:
-Promotes the growth and development of roots, flowers, and fruits.
-Increases crop yield.
-Gibberellic Acid (GA)

✏️Uses:
-Manipulates flowering and fruit development.
-Reduces the incidence of some physiological disorders.
-Cycocel (CCC)

✏️Uses:
-Reduces stem elongation.
-Induces early flowering.
-Improves flowering.
-Produces compact plants with multiple buds per shoot.